Wire too big for breaker
I have run about 250' of #6 THHN in conduit to a sub panel from my main panel. This will be to run a pool pump. I bought 30 amp breakers. The trouble is the wire will not fit in either breaker. One is Cutler-Hammer the other Square D. What can I do? Also I used 8/2 UF to wire the receptacle at the pool. Will I have any problems wiring the receptacle with this wire size?